Mold.



PATENTED APR. 16, 1907.

- F. T. DICKINSON.

MOLD.

APPLICATION FILED DEC. 5. 1905.

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' MEUIHHHEWI "H -WHIP Th1 No. 850,629. I PATENTED APR. 16, 1907. P. T. DICKINSON. MOLD.

APPLICATION FILED DEC. 5, 1905.

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r, l 5 a W w a, N T\\ WW V.... IW 9 W x WAaE= V Y E @v I ll a mu /0 Illlll 6 W H 76 0O W A 6 V/////////////// f n PATENTED APR. 16. 1907. .F. T. DICKINSON.

| I l L I v I ill MOLD! UNITED STATES PATENT OFFICE. 7

FRANK T. DICKINSON, OF CHICAGO, ILLINOIS, ASSIGNOR TO AMERICAN BRAKE SHOE & FOUN DRY COMPANY, OF JERSEY CITY, NEW JERSEY, A

CORPORATION OF NEW JERSEY.

MOLD.

Specification of Letters Patent.

ltonlication filed December 5,1905. Serial No. 290,341.

Patented April 16, 1907.

To (til 70/1/0711 it mayemwern:

Be it known that I, FRANK T. DICKINSON, a citizen of the United States, residing at Ohicago,-in the State of Illinois, have invented placing of the parts of the mold is accomplished automatically, and the release of such parts and the displacement of the casting is also automatic. More particularly the invention contemplates the placing and dislacing of the parts of the mold by means of a Eodily relative movement of the mold and acam track. The invention further resides in the improved combined sand and metallic mold, and in the particular means for accomplishing the result which'is set forth in the claims" and illustrated in the accompanying drawings, wherein Figure 1 is a top plan view; Figure 2 is a side elevation showing a part of the supporting frame and the cam track in position to release the casting Figure 3 is a cross section on the line (3) of Fi re 1;

l i gure 4 is a cross section on the line (4) of Figure 3; 7

Figure 5 is a similar cross section showing the upper mold member and the cheek plates with the lower mold member removed to release the casting Figure 6 is a side view of a modified form oi my invention, and

Figure 7 is a transverse section on the line (7) of Figure 6.

The objectillustrated as cast, is a brake shoe, and this is What the mold is primarily intended to produce, but it is apparent that the invention may be applied to the production of many other articles and is not limited to brake shoes. The mold is of metal and the construction consists in the preferredform of an upper mold member and a swinging lower mold member operated by a cam track over which the mold moves bodily. This ar rangement may be reversed, however, and the tracks made to move past the mold. The parts are so arranged that the relative movement of the track and mold first swings the lower member up into position for pouring and then after the pouring; allows the lower member to swing downward allowing the casting "to fall. The swinging of the lower member also acts to bring the side or cheek plates, which are slidably mounted on the upper member, into position. Y

As shown in Figure 2, 6 is theirame-work upon which the parts of the mold are mounted. This trainework is carried upon a movable carriage which may be of any form desired, and is not shown. 7 is the cam track past which the carriage moves. This track is arranged in such a 'way that at one part of the movement the swinging lower member of the mold S is held as indicated in the full lines in Figure 2. and at another portion of the movement is allowed to swing in the posilion shown in the dotted lines. This result is accomplished by making the track 7 horizont alfor a portion of-its length opposite the point'otpouring, and at adistance therefrom as indicated in Figure'2, sufficient to keep the mold closed. After such horizontal portion, the track inclines downwardly and also laterally so that as the mold passes over it the lower member may swing to the position shown in dotted lines in Figural, after which that-rack curves up'to a horizontal position again. The swinging mold member is provided with a roller'g for hearing against the track, The upper portion of the mold 9 is held upon the. carriage removably, by virtue of a sliding engagement with the pins 10.

.This part of the mold carries the principal part of the impression for the casting and has at its central part the pouring plug 11, provided with the opening 12 and ,the recess 13 with the cross core'14 for'forming the perforated attaching means on the brake shoe. The pouring plug is of green sand carried in a 4 removable casing 15,50 that when the castof a green sand gate-way obviates these difficul'ties, and there is no clogging or burning out. It will also be noted that the useof the sand plug is of particular utility inthe pro-'.

duction of brake shoes, as it is desirable to obtain a body with a hardened surface which has a lug of softer and more tenacious structure, and the use of the sand plug produces! this'res'ult, as the sand prevents a sudden cooling and consequent hardening of and reduction of tensile strength of the plug while the metallic body of the mold secures the hardened surface in the main portion of the shoe. The member 9 also carries the cross pins 16 on the end of which 'the cheek plates 17 are slidably mounted for lateral movement. 7 As shown in Figures 4 and 5, these cheek plates are .of trian lar cross section having flat lower sides a aptedto fit the top of the lower mold andfollow its curved contour. They are provided on their upper surfaces with cam faces 18 which are adapted to contact with the cam faces 19 on the upper part of the mold 9, so that when the lower swingingmold member 8 is brou ht into position it 'Will'force the cheek 'p'ates laterally into I proper position. The parts 17 rest upon the ltrwhen the swinging mold member 8 is.

Own, but when such member is raised the parts 17 are raisedoif of the pins'16 as shown in Figure 2. As shown in Figure 4, the cheek plates are infposition for pouring, while in lgure they are in the release position occu-' pied afterthe swinging member of the mold as been withdrawn. The'swinging member 8 is hinged to the carriage at 20 and is adapt-- :ed'to overlap the casting andforms asuppor't "for the cheek plates 17, as shown in Figure 4..

- 'It'is provided at its free ends with a roller 9,

which contacts with thetrack and controls the movement of the swinging member.

my twice in which instead of having-the fixed upper section 9 I provide the movable section 21 pivotally secured to the frame at 22 by means of the link 23, which link is pivoted at 24. This permits theupper section to be turned upside down for examination and repalr. A further'modification in this form of the device resides in the means for holding the sand plug with its casing 26' down,-thereby resisting the buoyant force of the flllld metal to lift the plug out of its.

proper place after pouring. This device may be also applied to my other form of mold, and

consists of sidearms 27 pivoted at 28 and provided with a art 30 which projects over the top of the mo d and engages the plug and a proj ectmg portion 29 which acts as a weight to hold the arms down on top of the plug as shown in'Figure 7.

The operation of the device is as follows;

Starting with the mold in open'position, as shown 1n dotted lines in Figure 2, the carrlage lsmoved along the track 7 which gradu- Figures '6 and 7 illustrate a modification of ally changesfrom' the. position sliown in dotted lines to that 'shown in full lines.' j During this movement. the member 8 contacts with thecheeli plates and'cams them into position.- In the latter position the mold is closed and the casting is poured. After 'suflicient cooling the carriage moves over a' slanting portion of the track which is adapted 'to allow the mold to open to the position shovm in Figure 2, thus allowing the cheek platesi17, which are held tightly in position by the memberS, to loosen up and release the casting which falls into'a proper receptacle. The operation is then repeated.

' .Having thus described my invention 'and illustrated its use, what I claim as new, and desire to secure by Letters Patent, is the following: 1

1. In combination in a casting machine, a cam and a mold movable relative thereto, and comprising an upper molding member and another co-operating member movable downward to substantially a vertical position to permit 'ofthe discharge of the casting by its own weight and having means to co- 0 erate continuously with the cam whereby t e movable section may be operated.

2 In combination in amold, an,

ulpdper membercomprising one side of the mo asectionmovable relative thereto comprising the opposite side of the mold and opposing cheekplates movably mounted and a apted to be moved into position by the movement I of the movablemember.

'3. In combination in a imold, an u' per .movably mounted upon one of the members and having a cam surface to co-act with the cam surface of the first section, all so ar-' ranged that a relative movement of the first two sections operates to move the cheek plate in its osition.

' 5. n combination in a casting machine, 'a relatively movable cam trackand mold comprising an upper mold member having a cam surface adjacent its face, a section movablerelative thereto and co-acting With the camtrack, constitut'ng the lower side of the mold;

and a check piece provided with a cam surface to co-act with the cam surfaceon the upper mold member and movablymounted, all' so arranged that a movement of the mold bodily, relative to the cam track, raises the 4. In combination in amold, a section havapproach the upper sec.-

Ito

lower mold member and causes the cheek! 9. In combination, a mold comprising a plate to-advance in position.

6. In combination in a casting machine, a relatively movable cam track and mold-comprising an upper mold section having a cam" surface adjacent its face, a lower mold member hinged'at the end and coaoting with the cam-track, and a cheek plate provided with a' cam surface to co-act with the cam surface of the upper mold member and movabl y mounted all so arranged that a movement ofthe mold bodily successively raises the hinged section cannning the cheek plate into posi tion and then release such hinged member so that it may swing open.

7. In combination in a casting machine, a relatively movable cam track and mold com' prising an upper moldmember having cam surfaces adjacent its face, a lower mold member hinged at the end and co-acting with the cam track, and opposing cheek plates provided with cam surfaces to co-act with the cam surfaces on the upper mold member and slidably mounted, all .-so arranged that the movement of the mold relative to'the cam track successively raises the hinged mold member thereby camming the cheek plates into position and then releases such hinged mold member so that it swings open.

8x111 combination, a relatively movable cam rail and a mold comprising an upper mold member constituting the top and ends of the mold and having cam surfaces adjacent the'face, a lower mold member extending out past the mold surface of the upper mold member and constituting the bottom of the mold, and being provided with a part to co-act with the cam track, and cheek plates withcam surfaces adapted to co-act with the cam surfaces on-the upper mold member, slidably mounted and ada ted to contact with the 5 upper surface of t 1e hinged mold member, a 1 so arranged that a movement of the track relative to the mold will successively raise the hinged member camming the cheek plates into position and release such hinged member allowing it to swing open.

metal body portion provided at its top with a pouring opening, a removable casing shaped to fit such opening and to support a green sand gateway plug and extending :through the body portion, and a green sand gateway plug therefor.

10. In combination, a mold comprising a metal body portioniprovided in its top with a. taperingo ening, a removable externally and internal y tapered casing adapted to fit and line such opening, and a green sandgateway plug fitting the casing and entirely supported thereby.

11. In combination, a mold comprising a metal body portion provided in its top with a pouring opening, a removable casing adapted to fit and line such opening, and tapering internally, and a green sand gateway plug fitting the casing and entirely supported thereby. I 12. In a casting machine, in combination, a metal mold comprising an upper member and a lower movable member for releasing the casting, the upper member being provided with a pouring plug of green sand having a core fixed therein.

13. In a brake shoe casting'machine in combination, a metal mold comprising an upper member and a lower movable member for releasing the casting, the upper member having a removable casing provided. with apouring plug of green sand and a baked core fixed'in the sand.

14. In combination in a mold, a frame, a top section slidingly engaging the frame, an arm pivotally connecting the top section and the frame, a swinging bottom section, and means for operating such bottomsection.

In testimony whereof I have hereunto signed my name in the presence of the two subscribed witnesses.

f FRANK T. DICKINSON.

Witnesses:

PAUL CARPENTER, ALBERT G. MILLER. 

